问题补充：
Iin the house whichbooks and magazines.
A. am used to live;uede to keeping
B. used to live;has been used to keeping
C. have been used to living;was used to keep
Dused to live;was used to keeping
答案：
A. am used to live;uede to keeping
B. used to live;has been used to keeping
(答案→)C. have been used to living;was used to keep
D. used to live;was used to keeping
解析：考查used的用法。句意“我已经习惯了这个房子里居住，这个房子以前是用于存放书籍和杂志。”be used to doing sth.“习惯于做某事”；be used to do sth.“被用于做某事”。故选C。
